Clinical Report: Associations Between Karyotype and Phenotype in Turner Syndrome
Overview
This study investigates the associations between karyotype variations and clinical features in Turner syndrome (TS) patients. It highlights significant differences in spontaneous menarche rates and autoimmune hypothyroidism prevalence among different karyotype groups.
Background
Turner syndrome is a common sex chromosome disorder characterized by the absence or structural abnormalities of the second X chromosome. Understanding the relationship between karyotypes and clinical phenotypes is crucial for optimizing management and care strategies for affected individuals. Early diagnosis and treatment can significantly improve growth, pubertal development, and overall quality of life.
Data Highlights
Characteristic
Finding
Median age at diagnosis
9.3 years
Classical monosomies
44.2%
Mosaic cases
18.6%
Structural abnormalities
37.2%
Spontaneous menarche in 45, X individuals
4.3%
Spontaneous menarche in mosaic cases
50.0%
Spontaneous menarche in structural abnormalities
45.5%
Autoimmune hypothyroidism prevalence in structural abnormalities
46.9%
Key Findings
The majority of participants were diagnosed with classical monosomy (44.2%).
Significant differences in spontaneous menarche rates were observed: 4.3% in 45, X individuals vs. 50.0% in mosaic cases.
Autoimmune hypothyroidism was more prevalent in individuals with structural X-chromosome abnormalities (46.9%).
No significant association was found between karyotype and one-year growth hormone response.
Growth hormone treatment led to a significant increase in height standard deviation score, particularly in the first year.
Clinical Implications
Understanding the karyotype-phenotype associations in Turner syndrome can guide clinical discussions and management strategies. This knowledge is essential for setting realistic expectations for patients and families regarding growth and developmental outcomes.
Conclusion
The study provides valuable insights into the associations between karyotypes and clinical features in Turner syndrome, emphasizing the importance of early diagnosis and tailored management.
A large Epic Cosmos analysis linked vaginal estrogen prescribing with lower rates of sepsis, hospital admission, and death following recurrent urinary tract infection, but researchers cautioned that prescribing may also mark broader differences in care.
